Improvement in sewing-machines



3 Sheets-Sheet 1'. A. H. WAGNER. SEWING-MACHINE.

- No. 177,038. Patented May 2,1876;v

lll

v "Il I y W11? assas= N- PETERS, PHUTC-L-ITNOGRAPHE. WASHINGTON. D. C.

3 Sheets-Sheet Z A. H. WAGNER.

' lSEVVIN'l-MA.CHINE. No. 177,038. Patented May 2.1876l WITN E55 E5= NAPETERS, PHOTO-LITHOGRAPNER. wAsNNGON, D C,

Y 3 Sheets-Sheet 3.. yA. H.- NVAGITER.v I SEWING-MACHINE.

Patented Ey 2,18746.

' JfrUsBEnT H. WAGNER, ion Curone@ rLLINoIs,

,SPBGOROU forming-pa'I-t-ofl Lttrs dated 2, 1876 application filed i Apri18,1"875. y y Y Belit known that I, AUsBERTHLI'WAGNEm ofifGhfica%o,-inthe county o'fg'Oook, and in the State ofgl linois, have vinvented certain new and useful Improvements in Sewin g- Machines an d dohereby declare that' the followingA is a full,

clear;and exact description thereof, -reference bein gvliadto theaccompanying,drawin gs, inakingapart ofthis specification, in which- Fi gure Lis a-V side yelfejv,ation of my improved mach-ine,.showing the needle-bar` in an elevated,V position. Fi'gsLj 3,' .and 4, arelike y views: zoffthesame, showin g', r'espective1y, the` successivepositions of said need1e=.bar. Fig.

5 is aplan view ofthelower side of said ,ma-

chine,` Figs andiareside elevations of' thehousing or head for the needle-bar, ,said

bar/ being-4 removedso -as to show the'con'struetionand'operation ofthe take-up. Fig; 8 is a rear-elevation' of 'thetension,y Figs..9"and'10 aresections ofthe same upon lines romand .e z, respectively, of Fig, 8'.. Fig. llris averticall section Lof thefpresser bar andhead, showing thearrallgment of the spring used for oper-` atingthe former; and Fig. 12jislv a horizontal sectionofthe'head or housing which contains the presser and needle bars. v v

Letters of like name and parts inA each of the lign-res.-

My invention is designed' tov increase the simplicity, durability, land ',-ease of 1 operation' of ashuttle sewingfmachine'; and it consists,

principally, in the construction and operation of the journal-'boxes of the driving-shaft, substantially as and for the purpose hereinafter set forth. It consists, finally, in the arrangement ofthespring employed for operating the presser-bar, substantially as and for the purpos'e hereinafter shown and described.,

In the annexed drawings, A represents the bed-plate of my machine, from one end of whichl exte'ndsfupward and then forward the Xed arm B, that supports the operative mechanism above said base. At the -front en d of lthe arm B is a vertical head, B', which is prokma A'refer-to like;

videdwithin opposite sides-withvertical'T-f Y, y

shaped grooves b'and'gb, one of" which receives, l, Y' the presser-bari), and the second groove the v needle-.liar'D Asseen inl Fig, 12each fofjthe' y bars'CaiidDjistlat,A with a thick-nesszequal' 'Ito aboutfone-fourth its width, and is Epla'eed so :as'to vbri-ngits longest transversedimensions Y in a linewith the arnrB, Adownward press# ,ure is given' to the bar 0, by meansof ay spiral n s'pring, E, y Whichfis Vattached ,at its upper-end l fto'or upon the inner face fof said bar, and at Q its lowerendtosoine suitable 'xed point bfcelow, the 'arrangement being suchy astocanse the longitudinalcontraction of' said spring; to

draw` said'presser-.bar downward..l

l In order thatthe forcefoflth'efspringLEnnayl b ie varied atvwill, a rod, F, is, placed'within saidspring,'ani/passing;upwardhas its upv per threaded `portion contained' Within a' cor- ,respondin g'lly'fth'readed'lopenin gj in the upper end off th'e headB.

xed -bearingtorfthe same.

greater downward'pressure upon the barsC, While by partially,Withdrawing'saidf screw from said head. such pressure will belessened in a corresponding degree.

Byrarranging' the springlE so tas to-causeff it to operate by contraction, greater elasticity j and durability are secured than could be` the.

case were its force exerted byexpansion.

{ Pivoted'to or uponl one side 'of i the arm B, near the intersection of its vertical and horizontal portions, is a vibrating arm, G, which has the form shown in Figs. l and 4, and is` v of 'acrank, H, thatis journaledat opposite t ,ends to or upon said parts.

Directly beneath the .rearven'd of the fixed l. arm B is a shaft, I, which isljournaled within suitable boxes K and K, (that are connected M with' the lower side of the plate A,) and has a line at a right angle to the line of the vibrat- The upper end of said'. yscrew sprovided with a milled'head, jji'while vits-lowerendr is pointed', andrttingiinto the contracted lower en d of said spring, forms they As thus arranged, fit will beseen thatby moving the screw idownwardwith'in the 'head B', the spring E will be lengthened and lcaused to exert a y in in G. y1 Th en pper porti each? bearing Kis" cast npo'nand t'orrns partof'said bed-:

plate, while the `lower halt' K' is detachable andits betweentwo vertical jaws, Icand k,-

wllereit is secured in place by apin, la', that passes horizontally throughsaidparts-j i j i Upon the end ot' the shaft Iladjacent to the l lowerend ot the vibrating arm Gr is secured a disk, L, that is` provided .withilifits"outer' face with a cam-groove, L, which groove receives a stud, g, that is attached to and `eX- V fteudshorizontallyinward from the facerotf said vibratin g arm( The shape `of the groove l is such as `to he "purpose of' loosening the i'ahl'efthe` shnttle to pass greater ease fand certhe` bedplate A' -is 'secured a shuttle-race,I M,

is loperated lwyoneaiis of a Icrank,li,yforined connecting-rod, 0, that, is ,lourn'aled at one end upon said' crank, and ate its'oppsiteend upon afstud, a', that projectshprizontallyouh' ward t'r'om'onesideot"said carrier. i

A f eedhar, l, is placed within suitable bearin'gsdirectly beneath the needle-bar, and

ata right'angle to the shuttle-race, and is so longitudinal motions;

longtndinalcenter to orupon the lower side of theplate A,and has oneot'itsends looselyy connected with one end of said needle-bar, whileits 4other (rear)v end extends horizontally to the shaft `1, and thus 'curves' downward and rear-` ward beneath the same. i

A cam, R, secured upon and rotating with the shaft I, engages` with the rear end of Vthe bar Q, and gives to the same such lateral and vertical motion as to cause the front end of said bar to communicate theusual'four motions to the feed-bar P.

In order to provide for the necessary duplex 'motion of the bar Q at its pivotal bearing,

said `bar at such point has a spherical enlargement, q, which fits looselywithin a corre#- spending recess or soclietithat is formed within the box Q', such construction forming a ball-and-socket bearing for said bar. The longitudinal motion of the feed-bar P isregulated by means of a slide, P', which is loosely attached to the lower side of the plate A at the end of said bar, and is capable of longitndinal motion at a rightangle to the lille 0f the latter.` The ed'ge of the slide P' contiguous to the end ot'` the' feed-bar P forms an inclined plane, p, so that by moving said slide in 011e direction said inclined plane moves the latter.

t p1ares',s and T, the "firstfof 'which is rigidi rearward at i'tsfupperland lower edges`,i wliile"` i said thread by means f` a` threaded st that vis secured withinthehead B',",a` n

. Spring, V, is ilfwed` amends/aid; Std; Withtsf inner end bearing` upon theouterhceot1 said plate'T, anda nut, a,fplaced uponfthefoute end of said stud, and bearin`g`against the co pressure upon the spring t t constructedas'tohave the usual verticaland 1 I right angle to the line of said`spring, and,by` Motonlis imparted to the feed bary Pby` Ain eansofa bar, Q, that is journaled near its As seenin Figs. 8,i9,and1`0, tensionloflthe upper thread'` is fproducedf by means `of tw attached toor upon the head B', and isflan ged the second plate T, formed ot' springnneta] attached at oncend toor upon the correspon( ing end ot? saidxed plate S,and.bearsagainst the outer face ot' the latter between theiianges s and s, N earthe outer lends` ofr theplatesS. and T a notch, s',fis"formed in eachtlangefa so as tofperrnit a threadtopass vertica tween said plates, the outerfof which, 1sl caused to y bear withj `varying pressure upon jects outward through si 1 1tabl e opening the cen tralI port-ion of y said` plates; A isplra responding end ofsaid spring. Byscrewing i the nut u inward or outward the springiY@ will be compressed or (released, andcaused to exert a correspondinglygreater :orllegs i 'y having the'form shownin` Eigs. 6 and 7,1whichgyis rigidly attached at cneeiid `within "theginlf l terior'of'the head B', andat its"oppostitelower end is provided with an` eye, w,`tha't`ihas"a moving the latter forward, maybe `c ausedgt j projectoutward 'through an op`ening,b',l in`fthe latter being contained within the head B',

where it cannotinterfere with the operation of the machine. "W t The peculiar forms ofthe needle and presser bars render them easy to construct, less labor is required in fitting them to the head, and they have less dead-weight to move thanilr` case ofround bars, Vwhile by arrangingsaid y l needle-bar with its greatest transverse diamo-' ter in a line with the vibrating arm,1whi1e" l comparatively thin, it is `risadily able to withv stand all strain thrown upon it by the latter; y l Having thus fully set forth the nature and t meritsof my invention, what I claim as .new i 1sf 1. The take-up spring W zb, constructed as t shown, and 4arranged within the head B', in

com hination with the stud d, which bears upon its rear inclined side, and operates to withdraw the slack of the upper thread with-in said head, substantially as and for the purpose shown. l

2. In combination with the lever Q, the ball- :rnd-socket bearings P und Q', respectively, substantially as and for` the purpose specified.

3. In combination with the shaft I, the fixed boxes K and K, provided each with jaws la k, and the detachable boxes K and K', fitted within said jews, Aund secured in place by means of the pins lo and k', substantially as and lfor the purpose set forth.

4. In combination with the presser-bar C,

working;r lon gitudinztlly Within the vertical ,slot

i b ofthe housing B", the screw F, passing downward th rough a threaded opening` in seid housing, and the spiral spring E, attached at its upper end to seid presser-bar, and at its lower end to the lower end of said screw, substantztlly as ztnd for the purpose shown und described.

In testimony that I claim the foregoing I have hereunto set my hand this 26th day of December, 1874.

` A. H. WAGNER.y Witnesses:A

GEO. S. PRINDLE,

WILLIAM FrrcH. 

